LONG TIME measuring

i need measure long time event (consuption from main battery in my car /of course i have converter I/U for nano/) ,
for example about 30 minutes measuring. It is possible ??

  • one way wold be increase time base from 10s to cca 60s

  • maybe better - autosave buffer to xml (when filled and if timebase is 10s)

    is one possible?

or is other way ?

many thanks